Okay, I have a rooster and 3 hens together right now. One hen is laying, I have no idea how old the other two are, but they have not started laying yet, and the rooster seems full grown. We will also be adding much younger birds to the flock, and they all eat together in the coop. My question... Should I be feeding them all a regular feed (grower feed?), and have something like crushed oyster shells on the side? Or are they all okay on layer feed? I also found this about fermented feed, http://ohlardy.com/fermented-chicken-feed and would like to know if we are supposed to feed them part reg food, part fermented or if you just make the switch completely? THANK YOU!